Frisee is a finely curled endive. Frisee has narrow, deeply and finely cut curled and twisted leaves, that are pale yellow green to lime green. Baby versions are quite pale and have a fine delicate flavor. As they grow older, they can get quite bitter so it is advisable to use young and tender plants.

Here are a few nice sites for Frisee:
http://www.cooking.com/recipes/rerecite.asp?794

http://www.ornamentaledibles.com/endivefrisee.html

http://www.1webblvd.com/coosemans/prod097.htm